International Journal of Polymer Science

Research Article

Diffusion Coefficients of n-Alkanes and 1-Alcohols in Polyethylene Naphthalate (PEN)

Table 2

Experimentally determined diffusion coefficients .
SubstanceDiffusion coefficient (cm2/s)
140°C135°C130°C125°C120°C110°C100°C
Methane  7.3 10-10 7.3 10-106.7 10-106.1 10-10
Ethane  5.4 10-10 3.6 10-102.3 10-101.3 10-10
n-Propane  1.3 10-10 5.7 10-112.4 10-111.1 10-11
n-Butane  4.5 10-11 1.7 10-116.3 10-122.5 10-12
n-Pentane4.0 10-112.9 10-111.7 10-111.1 10-116.7 10-12  
n-Hexane2.8 10-111.8 10-119.3 10-125.0 10-123.3 10-12  
n-Heptane1.9 10-119.8 10-125.6 10-122.6 10-121.4 10-12  
n-Octane1.3 10-115.8 10-123.3 10-121.3 10-12   
n-Nonane9.3 10-123.7 10-121.9 10-12    
n-Decane5.9 10-122.0 10-121.1 10-12    
n-Undecane4.0 10-121.3 10-128.9 10-13    
n-Dodecane3.8 10-12      
1-Propanol7.7 10-115.5 10-113.8 10-113.0 10-111.8 10-11  
1-Butanol4.6 10-113.1 10-112.1 10-111.4 10-11   
1-Pentanol2.9 10-111.8 10-111.1 10-117.5 10-12   
1-Hexanol2.0 10-111.2 10-116.0 10-123.6 10-12   
1-Heptanol1.3 10-117.2 10-123.4 10-121.4 10-12   
1-Octanol9.0 10-125.1 10-121.9 10-12